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Bronze straight union with cup and MNPT ends

Nibco, Inc.

Nibco, Inc. 733-4-LF Bronze Union 2 1/2in Cup x MNPT 269 psi 200 Degrees F

SKU CH-Q4F7-X4C33

Bronze straight union joins 2 1/2-inch copper tube to male pipe threads, rated 269 psi at 200 °F for potable water and certified to NSF/ANSI 61 and 372

  • Product colorTransparent
  • Product typePipes, Valves & Fittings
  • Bronze construction resists corrosion for long service life
  • 269 psi rating handles high-pressure potable water systems
  • 200 Degrees F maximum temperature suits hot water lines
  • ASME B 16.18 and NSF/ANSI 61 compliance ensures code acceptance
  • Sweat cup by MNPT union allows quick copper-to-thread transitions

Bronze Union for Potable Water

This bronze union connects 2 1/2 inch copper tubing to a matching male pipe thread in straight runs. It is rated for potable-water systems and meets ASME B 16.18, ISO 9001, NSF/ANSI 372 and NSF/ANSI 61 standards.

Pressure and Temperature Limits

The fitting withstands a maximum operating pressure of 269 psi and a maximum operating temperature of 200 Degrees F. These limits define the safe envelope for continuous service in hot and cold water distribution.

Capacity and Headroom

The union handles typical residential and light commercial flow rates through its 2 1/2 inch bore. It is not suited for applications exceeding the stated pressure or temperature ratings or for non-potable fluids incompatible with bronze.

How it compares

Measured against everything we stock in Bath Accessories & Soap Dispensers, at today’s prices. Recalculated every night.

Price $363.99
Pricier than about 91% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameNIBCO
Product colorTransparent
Product typePipes, Valves & Fittings

Questions about this item

Which size and connection type should I select for a 2 1/2 inch copper line?

The union is a single 2 1/2 inch cup-by-MNPT configuration in bronze, so no alternative sizes or connection styles are offered for this listing.

How does the 269 psi rating apply when the fitting is installed in a potable water system?

It represents the maximum operating pressure the bronze union can withstand at up to 200 °F under ASME B16.18 and NSF/ANSI 61 potable-water approvals.

What do the ASME B16.18 and NSF/ANSI 372/61 standards limit in practice?

They certify the bronze alloy for lead-free potable water use and define the pressure-temperature envelope the straight union must meet at 2 1/2 inch nominal size.

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